This month take a walk along our country lanes after dusk to experience the heady scent of honeysuckle, a common hedgerow climber. Honeysuckle switches on its scent at dusk to attract moth pollinators, such as the elephant hawkmoth. In addition to the plant’s scent petal colour may play a role in attracting these insects. Species such as the elephant hawkmothhave sensitive colour vision, capable of distinguishing different hues by starlight. The exposed faces on honeysuckle petals turn from pale cream to yellow after pollination. Maybe this is the way the plant shows the moth not to waste energy visiting a flower that has already been drained of nectar by another pollinator.